Ok, not a forecourt owner, but here goes in trying to create a straightforward explanation.
When Oil was $147 a barrell, it was converting to about €91
Now $98 is converting to about €73. So while the barrell dropped by €18 (19%) the price you paid has dropped by 10 cent per litre or 8%. You also need to take into account that some of these stations may have purchased their fuel nearly a week ago, when the barrell was about $7-8 higher.
Not in any way defending the pricing of Petrol or Diesel, but just trying to explain how the different aspects of the world economy affect our buying prices!!
I understand what you are saying but to be fair to the people complaining about it, when oil was going up in price, the dollar was getting weaker and yet the consumer was still hit with the full impact of oil price rises.
There are economic factors at play but there is no doubt that retailers/ oil companies must be trying to have higher margins for as long as possible and I can't blame them. I would only have a problem if it was proven that garages/ oil companies were engaging in anti-competitive behaviour but there is no evidence of that as far as I know.